中文摘要：

为解决红外测温系统超出有效测温距离导致的测温精度下降问题,从红外热辐射理论出发,提出了一种视场超出目标辐射表面积的红外测温系统误差修正方法。通过计算全视场范围内的辐射照度,获得了对应的红外测温系统电压响应值。依据电压响应值与温度之间的关系,并充分考虑物体表面形貌特征,去除全视场范围内背景温度的影响,得到目标体的表面真实温度值。相对于以往的修正方法,该方法能很好地修正有效测温距离外的物体表面温度,结果与被测物体实际温度更为相近。因此,该方法极大地增强了红外测温系统的工业现场适用性。

英文摘要：

As infrared temperature measurement system is beyond effective working distance, measurement accuracy will decrease. To solve this problem, starting from thermal infrared radiation theory, a novel error correction method was proposed, which can be applied to the situation that the field of view is beyond the irradiated area of the ob- ject. Radiation illumination within whole visual field was calculated to obtain corresponding voltage response of infra- red temperature measurement system. According to the relationship between voltage response and temperature and morphology characteristics of object surface, the influence of background temperature within whole visual field was re- moved, and real temperature values of object surface were obtained. Compared with previous correction methods, this method can effectively correct the temperature of object surface when temperature measurement system exceeds effec- tive working distance. And the corrected results are closer to the actual temperature of object. Therefore, this method can greatly enhance the industrial applicability of infrared temperature measurement system.